In a statement provided to the Tennessean Underwood's representatives say Brett James, Chris DeStefano and Underwood wrote her 2014 hit song. It's a "deeply personal song regarding Carrie’s faith and she is saddened that anyone would attempt to challenge that for financial gain."

"Neither Carrie nor any of her co-writers ever received or heard the plaintiffs’ song," a rep furthers. "We fully expect that Carrie, Brett and Chris will be vindicated in the courts.

Canadian writers Ron McNeill and Georgia Lyons claim they pitched a song of the same to Underwood's producer Mark Bright in 2014. They never heard back, but later learned she had recorded a song called "Something in the Water."

Nastiest Lawsuits in Country Music

"The hook on the infringing work, as released on the album, is structurally and lyrically identical, and substantially similar melodically to plaintiffs' composition of the same title," the two contend.

Underwood's Grammy-winning song made a tremendous impact at country and Christian radio. It was released as part of her Greatest Hits: Decade #1 album, although it's not clear if it was written new for that album or written for a previous album.

This is the second lawsuit involving a song Underwood was a part of. Last year she and Brad Paisley (as well as other defendants) defeated a suit that claimed "Remind Me" ran afoul of copyright laws. That duet was on Paisley's This Is Country Music album (2011).